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Explores artists who work with sound sculpture and sound-as-sculpture Works Cited Cage, John. Silence. Hanover: Wesleyan University Press, 1973. Cardiff, Janet, and George Bures Miller. Cardiffm...Full description
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‘Fractal Sound’ is a research project exploring the interaction between music and fractal geometry. It is a case study on the implementation of fractal geometry principles as the basis for m…Full description
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Sound MAY 2002
1
Four sound waves W, X, Y and Z are displayed by an oscilloscope screen. The oscilloscope settings are the same in each case.
W
X
Y
Z
Which two sounds have the same pitch? A
W and X
B
W and Y
C
X and Y
D
X and Z
1
2
A girl stands in front of a rock face.
rock face
660 m
The girl claps her hands once. The speed of sound in air is 330 m / s. How long is it before she hears the echo? A
2 x 660 ______ s 330
B
660 ___ s 330
C
330 ___ s 660
D
NOVEMBER 2002
3
Which of the following can be heard by the human ear? A
A whistle emitting a wave of frequency 50 kHz.
B
A bat emitting a wave of frequency of 30 kHz.
C
An insect emitting a wave of 300 Hz.
D
A vibrating spring emitting a wave of frequency of 5 Hz.
2
330 ______ s 2 x 660
4
Two sound waves P and Q are displayed on an oscilloscope with the same time-base and Y-plate settings for each.
P
Q
Which statement correctly describes the pitch and the loudness of the two sounds? A
P has a higher pitch and is louder than Q.
B
P has a higher pitch and is quieter than Q.
C
P has a lower pitch and is louder than Q.
D
P has a lower pitch and is quieter than Q.
MAY 2003
5
A sound wave passes through the air, in the direction shown. → direction of travel of sound wave
How does a particle of air move as the sound wave passes? A
moves to the right and stays there
B
moves left and right
C
moves up and stays there
D
moves up and down
•→ ←•→ ↑ • ↑ • ↓
3
6
A boy is stranded on an island 500 m from the shore.
500 m
cliffs
island
He shouts for help, but all he can hear in reply is the echo of his shout from some cliffs. Sound travels at 340 m / s through the air. What is the time interval between the boy shouting and hearing the echo? A
500 s 340
B
2 × 500 s 340
C
340 s 500
D
2 × 340 s 500
NOVEMBER 2003
7
Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no atmosphere in space.
hammer astronaut 1
astronaut 2
Compared with the sound heard if they were working on Earth, what does astronaut 2 hear? A
no sound at all
B
a quieter sound
C
a sound of the same loudness
D
a louder sound
4
8
Which change will lower the pitch of a sound? A
decreasing its amplitude
B
decreasing its frequency
C
increasing its amplitude
D
increasing its frequency
MAY 2004
9
Which type of wave cannot travel through a vacuum? A
infra-red radiation
B
microwaves
C
sound waves
D
X-rays
10 An engineer standing at P hears the sound of an explosion at X. Z
P
Y X
DANGER BLASTING
V
W
After the explosion, she hears two bangs. One bang is heard a fraction of a second after the other. The second bang is an echo from A
XY.
B
PV.
C
ZY.
D
WX.
5
NOVEMBER 2004 11 What is the approximate range of audible frequencies for most humans? A
10 Hz to 10 000 Hz
B
20 Hz to 20 000 Hz
C
10 kHz to 10 000 kHz
D
20 kHz to 20 000 kHz
12 A 100 metre race is started by firing a gun. The gun makes a bang and a puff of smoke comes out of the gun as shown.
starter
100 m
When does the finishing judge see the smoke and hear the bang? sees the smoke
hears the bang
A
immediately
immediately
B
immediately
after about 0.3 s
C
after about 0.3 s
immediately
D
after about 0.3 s
after about 0.3 s
6
finishing judge
MAY 2005 13 A fire alarm is not loud enough. An engineer adjusts it so that it produces a note of the same pitch which is louder. What effect does this have on the amplitude and on the frequency of the sound? amplitude
frequency
A
larger
larger
B
larger
same
C
same
larger
D
same
same
14 To estimate the width of a valley, a climber starts a stopwatch as he shouts. He hears an echo from the opposite side of the valley after 1.0 s. sound
climber
valley The sound travels at 340 m / s. What is the width of the valley? A
85 m
B
170 m
C
340 m
7
D
680 m
NOVEMBER 2005 15 Two astronauts without radios can only communicate in space if their helmets are touching. There is no air in space.
What does this show about sound? through a solid
through a vacuum
A
can travel
can travel
B
can travel
cannot travel
C
cannot travel
can travel
D
cannot travel
cannot travel
16 When the horn on a ship is sounded, the passengers hear an echo from a cliff after 4.0 s. If the speed of sound is 340 m / s, how far away is the cliff? A
170 m
B
340 m
C
680 m
D
1360 m
MAY 2006
17 Sounds are made by vibrating objects. A certain object vibrates but a person nearby cannot hear any sound. Which statement might explain why nothing is heard? A
The amplitude of the sound waves is too large.
B
The frequency of the vibration is too high.
C
The sound waves are transverse.
D
The speed of the sound waves is too high.
8
18 The diagram shows a man standing at X who shouts to a man standing at Y.
X N
W
E
S
Y The man’s voice will be heard sooner and more clearly if the wind is blowing towards the A
north.
B
south.
C
east.
D
west.
NOVEMBER 2006 19 A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which line in the table describes the amplitude and the frequency of the sound? amplitude
frequency
A
constant
varying
B
constant
constant
C
varying
constant
D
varying
varying
9
20 A sports field is next to a large school building. At the far side of the sports field, a student sees a groundsman hammer a pole into the ground. school building
student hammer pole
about 400 m
The student hears two bangs each time the hammer hits the pole. Why does the student hear two bangs? first bang caused by
second bang caused by
A
sound of hammer hitting pole
sound of pole hitting hammer
B
sound reaching left ear
sound reaching right ear
C
sound reaching student directly
sound due to echo from school building
D
sound reflected back from school building
sound reaching student directly
MAY 2007
21 Music is produced by the loudspeaker of a radio. Which property of the sound wave increases when the music is made louder? A
amplitude
B
frequency
C
speed
D
wavelength
10
22 A starting pistol is fired 640 m away from a spectator. 640 m
spectator
The spectator hears the sound of the starting pistol two seconds after seeing the flash from the gun. What is the speed of sound in air? A
160 m / s
B
320 m / s
C
640 m / s
D
1280 m / s
NOVEMBER 2007 23 A girl stands at a distance from a large building. She claps her hands and a short time later hears an echo. Why is an echo produced when the sound waves hit the building? A
The sound waves are absorbed.
B
The sound waves are diffracted.
C
The sound waves are reflected.
D
The sound waves are refracted.
11
24 The graph represents a sound wave. The horizontal (x) axis represents time. y
x
The frequency of the sound is increased. The graphs below are shown to the same scale. Which graph represents the new sound wave?
y
A
y
B
x
x y
C
y
x
x
MAY 2008 25 Which equation can be used to calculate the speed of sound? A
speed = distance time
B
speed = distance × time
C
speed =
D
speed = time + distance
D
time distance
12
26 A battery-operated bell is surrounded by a box with double walls. air bell
box walls
gap
The bell is ringing but no sound at all is heard outside the box. What is in the gap? A
a solid
B
a liquid
C
a gas
D
a vacuum
NOVEMBER 2008
27 Which word correctly completes the sentence below? An echo is a sound wave which is ………… by a large obstacle. A
absorbed
B
dispersed
C
reflected
D
refracted
13
28 In an experiment to measure the speed of sound, a student uses a stopwatch to find how long a sound takes to travel from X to Y. She does this six times. sound travels from X to Y X
Y
The table shows her results. time / s first
0.5
second
0.7
third
0.6
fourth
0.4
fifth
0.9
sixth
0.5
What value for the time should be used to calculate the speed of sound? A
0.4 s
B
C
0.5 s
D
0.6 s
0.9 s
MAY 2009
29 A small boat in a harbour is protected from waves on the sea by harbour walls. land
sea waves
small boat harbour
harbour walls
Some waves can curve round the harbour walls and reach the boat. What is the name for this effect? A
diffraction
B
dispersion
C
reflection
D
refraction
14
30 An engineer standing at P sees an explosion at X. Z
P
Y X
DANGER BLASTING
V
W
After the explosion, she hears two bangs. One bang is heard a fraction of a second after the other. The second bang is an echo. From which surface has the sound reflected to cause this echo? A
XY
B
PV
C
ZY
D
WX
NOVEMBER 2009
31 Which range of frequencies typically can be heard by a 10 year-old child? A
20 Hz – 2000 Hz
B
20 Hz – 20 000 Hz
C
200 Hz – 2000 Hz
D
200 Hz – 20 000 Hz
15
32 Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in space.
hammer
astronaut 1
astronaut 2
Compared with the sound heard if they were working on Earth, what does astronaut 2 hear? A
a louder sound
B
a quieter sound
C
a sound of the same loudness
D
no sound at all
MAY 2010
33 A police car siren emits two different sounds P and Q. These are produced alternately. The diagram represents the sounds emitted. P
P
P
displacement Q
Q
time
Which sound is the louder and which has the lower pitch? louder
lower pitch
A
P
P
B
P
Q
C
Q
P
D
Q
Q
16
34 What is the approximate value of the highest frequency that can be heard by a young person? A
B
20 Hz
C
200 Hz
2000 Hz
D
20 000 Hz
NOVEMBER 2010
35 The diagrams represent two different sound waves. wave P
wave Q
displacement
displacement
time
time
How do the frequency and pitch of P compare with the frequency and pitch of Q? frequency of P
pitch of P
A
greater than Q
higher than Q
B
greater than Q
same as Q
C
same as Q
higher than Q
D
same as Q
same as Q
36 A ship sends a pulse of sound vertically downwards to the sea bed. An echo is heard 0.4 seconds later. If the speed of sound in the water is 1200 m / s, how deep is the water below the ship? A
240 m
B
480 m
C
1500 m
MAY 2011
37 Sound travels by wave motion. Which property of waves causes echoes? A
diffraction
B
dispersion
C
reflection
D
refraction
17
D
3000 m
38 A student listens to a machine that makes sounds of different frequencies. He can only hear one of the sounds. Which frequency of sound is the student able to hear? A
B
2 Hz
10 Hz
C
2 kHz
D
30 kHz
NOVEMBER 2011
39 A student wishes to measure the speed of sound in air. She plans to measure the time between making a sound and hearing the echo from a cliff. cliff
student
She will use the equation: speed = distance . time Which type of sound should she make and which distance should she use in her calculation? type of sound
distance to use
A
continuous sound
distance to cliff 2
B
continuous sound
distance to cliff × 2
C
short, sharp sound
distance to cliff 2
D
short, sharp sound
distance to cliff × 2
18
40 The diagrams show the wave shapes of two different sounds. The scales are the same in each diagram.
time
time
sound 1
sound 2
How does sound 2 compare with sound 1? A
Sound 2 is louder than sound 1.
B
Sound 2 is quieter than sound 1.
C
Sound 2 has a higher pitch than sound 1.
D
Sound 2 has a lower pitch than sound 1.
MAY 2012 41 A girl stands at a distance from a large building. She claps her hands and a short time later hears an echo. Why is an echo produced when the sound waves hit the building? A
The sound waves are absorbed.
B
The sound waves are diffracted.
C
The sound waves are reflected.
D
The sound waves are refracted.
19
42 The diagrams represent the waves produced by four sources of sound. The scales are the same for all the diagrams. Which sound has the highest frequency?
A
time
B
time
C
time
D
time
20
43 Three loudspeakers vibrate at different frequencies of 5 hertz, 25 kilohertz and 50 kilohertz.
5 hertz
25 kilohertz
50 kilohertz
Which row shows whether the vibrations from each loudspeaker can be heard by a human? 5 hertz